Before going forward with joining the inner and outer wing panels, the inner panels were joined with the wing rod and mated to the fuselage to check fit.
Careful measurements were taken to check alignment of wings and then a 3/16" hole was drilled down through one of the wing bolt plates. Bolt plate has a 3/16" laser cut hole and it was used as a guide. A 3/16" diameter bolt was dropped down through this first hole, and then the other side was drilled and a second bolt was dropped in. Alignment measurements were rechecked before going forward.
One side was now drilled out for the tape size of a 1/4-20 size bolt. Threads were cut and a 1/4-20 bolt screwed in. Alignment measurements were rechecked and then the second bolt hole was drilled out and tap used to cut threads. Second 1/4-20 bolts screwed in. Bolts were then removed and clearance holes drilled into the wing. Threads in wings hold-down block were hardened with thin CA and, once CA cured, tap run through again.
Scrap plywood shims were used to center the forward section of the wings. With the rear wing bolts installed, holes for the wing dowels were drilled using a Fostner bit. Be careful about the depth, don't want to drill into the wing rod.
Wing was removed, depth of wing bolt holes were deepened as much as possible and then dowels were glued into the holes. Once glue cured, wing was again mated to the fuselage and alignment checked.
Now the structure for the upper cabin area was added using scrap plywood as spacers.
Masking tape was added to the wing root ribs and the wing saddle to account for the thickness of the wing covering material.
Careful measurements were taken to check alignment of wings and then a 3/16" hole was drilled down through one of the wing bolt plates. Bolt plate has a 3/16" laser cut hole and it was used as a guide. A 3/16" diameter bolt was dropped down through this first hole, and then the other side was drilled and a second bolt was dropped in. Alignment measurements were rechecked before going forward.
One side was now drilled out for the tape size of a 1/4-20 size bolt. Threads were cut and a 1/4-20 bolt screwed in. Alignment measurements were rechecked and then the second bolt hole was drilled out and tap used to cut threads. Second 1/4-20 bolts screwed in. Bolts were then removed and clearance holes drilled into the wing. Threads in wings hold-down block were hardened with thin CA and, once CA cured, tap run through again.
Scrap plywood shims were used to center the forward section of the wings. With the rear wing bolts installed, holes for the wing dowels were drilled using a Fostner bit. Be careful about the depth, don't want to drill into the wing rod.
Wing was removed, depth of wing bolt holes were deepened as much as possible and then dowels were glued into the holes. Once glue cured, wing was again mated to the fuselage and alignment checked.
Now the structure for the upper cabin area was added using scrap plywood as spacers.
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